Mercurial > hg
annotate mercurial/keepalive.py @ 39816:1cf1680b0554
keepalive: be more careful about self._rbuf when calling super impls
In Python 3, HTTPResponse implements read() in terms of readinto(),
which was calling back into our readinto(), which duplicates
self._rbuf if it's not empty. Before calling into super's read(),
ensure self._rbuf is empty.
Inheritance is bad, and undocumented self-use of your public API is
one of many reasons.
Differential Revision: https://phab.mercurial-scm.org/D4728
author | Augie Fackler <augie@google.com> |
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date | Mon, 24 Sep 2018 22:45:32 -0400 |
parents | d6d094259d9c |
children | f2dffa1359c6 |
rev | line source |
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1 # This library is free software; you can redistribute it and/or |
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2 # modify it under the terms of the GNU Lesser General Public |
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3 # License as published by the Free Software Foundation; either |
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4 # version 2.1 of the License, or (at your option) any later version. |
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5 # |
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6 # This library is distributed in the hope that it will be useful, |
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7 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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8 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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9 # Lesser General Public License for more details. |
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10 # |
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11 # You should have received a copy of the GNU Lesser General Public |
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12 # License along with this library; if not, see |
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13 # <http://www.gnu.org/licenses/>. |
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14 |
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15 # This file is part of urlgrabber, a high-level cross-protocol url-grabber |
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16 # Copyright 2002-2004 Michael D. Stenner, Ryan Tomayko |
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17 |
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18 # Modified by Benoit Boissinot: |
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19 # - fix for digest auth (inspired from urllib2.py @ Python v2.4) |
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20 # Modified by Dirkjan Ochtman: |
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21 # - import md5 function from a local util module |
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22 # Modified by Augie Fackler: |
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23 # - add safesend method and use it to prevent broken pipe errors |
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24 # on large POST requests |
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25 |
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26 """An HTTP handler for urllib2 that supports HTTP 1.1 and keepalive. |
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27 |
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28 >>> import urllib2 |
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29 >>> from keepalive import HTTPHandler |
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30 >>> keepalive_handler = HTTPHandler() |
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31 >>> opener = urlreq.buildopener(keepalive_handler) |
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32 >>> urlreq.installopener(opener) |
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33 >>> |
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34 >>> fo = urlreq.urlopen('http://www.python.org') |
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35 |
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36 If a connection to a given host is requested, and all of the existing |
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37 connections are still in use, another connection will be opened. If |
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38 the handler tries to use an existing connection but it fails in some |
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39 way, it will be closed and removed from the pool. |
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40 |
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41 To remove the handler, simply re-run build_opener with no arguments, and |
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42 install that opener. |
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43 |
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44 You can explicitly close connections by using the close_connection() |
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45 method of the returned file-like object (described below) or you can |
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46 use the handler methods: |
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47 |
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48 close_connection(host) |
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49 close_all() |
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50 open_connections() |
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51 |
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52 NOTE: using the close_connection and close_all methods of the handler |
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53 should be done with care when using multiple threads. |
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54 * there is nothing that prevents another thread from creating new |
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55 connections immediately after connections are closed |
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56 * no checks are done to prevent in-use connections from being closed |
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57 |
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58 >>> keepalive_handler.close_all() |
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59 |
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60 EXTRA ATTRIBUTES AND METHODS |
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61 |
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62 Upon a status of 200, the object returned has a few additional |
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63 attributes and methods, which should not be used if you want to |
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64 remain consistent with the normal urllib2-returned objects: |
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65 |
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66 close_connection() - close the connection to the host |
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67 readlines() - you know, readlines() |
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68 status - the return status (i.e. 404) |
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69 reason - english translation of status (i.e. 'File not found') |
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70 |
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71 If you want the best of both worlds, use this inside an |
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72 AttributeError-catching try: |
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73 |
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74 >>> try: status = fo.status |
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75 >>> except AttributeError: status = None |
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76 |
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77 Unfortunately, these are ONLY there if status == 200, so it's not |
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78 easy to distinguish between non-200 responses. The reason is that |
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79 urllib2 tries to do clever things with error codes 301, 302, 401, |
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80 and 407, and it wraps the object upon return. |
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81 """ |
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82 |
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83 # $Id: keepalive.py,v 1.14 2006/04/04 21:00:32 mstenner Exp $ |
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84 |
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85 from __future__ import absolute_import, print_function |
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86 |
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87 import errno |
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88 import hashlib |
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89 import socket |
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90 import sys |
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91 import threading |
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92 |
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93 from .i18n import _ |
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94 from . import ( |
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95 node, |
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96 pycompat, |
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97 urllibcompat, |
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98 util, |
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99 ) |
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100 from .utils import ( |
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101 procutil, |
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102 ) |
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103 |
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104 httplib = util.httplib |
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105 urlerr = util.urlerr |
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106 urlreq = util.urlreq |
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107 |
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108 DEBUG = None |
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109 |
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110 class ConnectionManager(object): |
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111 """ |
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112 The connection manager must be able to: |
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113 * keep track of all existing |
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114 """ |
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115 def __init__(self): |
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116 self._lock = threading.Lock() |
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117 self._hostmap = {} # map hosts to a list of connections |
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118 self._connmap = {} # map connections to host |
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119 self._readymap = {} # map connection to ready state |
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120 |
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121 def add(self, host, connection, ready): |
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122 self._lock.acquire() |
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123 try: |
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124 if host not in self._hostmap: |
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125 self._hostmap[host] = [] |
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126 self._hostmap[host].append(connection) |
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127 self._connmap[connection] = host |
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128 self._readymap[connection] = ready |
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129 finally: |
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130 self._lock.release() |
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131 |
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132 def remove(self, connection): |
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133 self._lock.acquire() |
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134 try: |
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135 try: |
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136 host = self._connmap[connection] |
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137 except KeyError: |
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138 pass |
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139 else: |
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140 del self._connmap[connection] |
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141 del self._readymap[connection] |
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142 self._hostmap[host].remove(connection) |
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143 if not self._hostmap[host]: |
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144 del self._hostmap[host] |
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145 finally: |
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146 self._lock.release() |
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147 |
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148 def set_ready(self, connection, ready): |
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149 try: |
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150 self._readymap[connection] = ready |
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151 except KeyError: |
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152 pass |
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153 |
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154 def get_ready_conn(self, host): |
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155 conn = None |
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156 self._lock.acquire() |
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157 try: |
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158 if host in self._hostmap: |
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159 for c in self._hostmap[host]: |
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160 if self._readymap[c]: |
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161 self._readymap[c] = 0 |
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162 conn = c |
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163 break |
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164 finally: |
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165 self._lock.release() |
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166 return conn |
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167 |
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168 def get_all(self, host=None): |
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169 if host: |
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170 return list(self._hostmap.get(host, [])) |
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171 else: |
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172 return dict(self._hostmap) |
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173 |
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174 class KeepAliveHandler(object): |
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175 def __init__(self): |
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176 self._cm = ConnectionManager() |
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177 |
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178 #### Connection Management |
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179 def open_connections(self): |
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180 """return a list of connected hosts and the number of connections |
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181 to each. [('foo.com:80', 2), ('bar.org', 1)]""" |
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182 return [(host, len(li)) for (host, li) in self._cm.get_all().items()] |
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183 |
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184 def close_connection(self, host): |
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185 """close connection(s) to <host> |
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186 host is the host:port spec, as in 'www.cnn.com:8080' as passed in. |
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187 no error occurs if there is no connection to that host.""" |
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188 for h in self._cm.get_all(host): |
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189 self._cm.remove(h) |
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190 h.close() |
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191 |
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192 def close_all(self): |
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193 """close all open connections""" |
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194 for host, conns in self._cm.get_all().iteritems(): |
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195 for h in conns: |
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196 self._cm.remove(h) |
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197 h.close() |
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198 |
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199 def _request_closed(self, request, host, connection): |
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200 """tells us that this request is now closed and that the |
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201 connection is ready for another request""" |
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202 self._cm.set_ready(connection, 1) |
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203 |
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204 def _remove_connection(self, host, connection, close=0): |
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205 if close: |
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206 connection.close() |
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207 self._cm.remove(connection) |
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208 |
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209 #### Transaction Execution |
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210 def http_open(self, req): |
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211 return self.do_open(HTTPConnection, req) |
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212 |
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213 def do_open(self, http_class, req): |
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214 host = urllibcompat.gethost(req) |
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215 if not host: |
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216 raise urlerr.urlerror('no host given') |
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217 |
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218 try: |
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219 h = self._cm.get_ready_conn(host) |
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220 while h: |
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221 r = self._reuse_connection(h, req, host) |
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222 |
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223 # if this response is non-None, then it worked and we're |
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224 # done. Break out, skipping the else block. |
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225 if r: |
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226 break |
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227 |
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228 # connection is bad - possibly closed by server |
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229 # discard it and ask for the next free connection |
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230 h.close() |
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231 self._cm.remove(h) |
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232 h = self._cm.get_ready_conn(host) |
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233 else: |
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234 # no (working) free connections were found. Create a new one. |
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235 h = http_class(host) |
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236 if DEBUG: |
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237 DEBUG.info("creating new connection to %s (%d)", |
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238 host, id(h)) |
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239 self._cm.add(host, h, 0) |
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240 self._start_transaction(h, req) |
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241 r = h.getresponse() |
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242 # The string form of BadStatusLine is the status line. Add some context |
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243 # to make the error message slightly more useful. |
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244 except httplib.BadStatusLine as err: |
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245 raise urlerr.urlerror( |
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246 _('bad HTTP status line: %s') % pycompat.sysbytes(err.line)) |
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247 except (socket.error, httplib.HTTPException) as err: |
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248 raise urlerr.urlerror(err) |
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249 |
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250 # If not a persistent connection, don't try to reuse it. Look |
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251 # for this using getattr() since vcr doesn't define this |
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252 # attribute, and in that case always close the connection. |
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253 if getattr(r, r'will_close', True): |
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254 self._cm.remove(h) |
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255 |
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256 if DEBUG: |
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257 DEBUG.info("STATUS: %s, %s", r.status, r.reason) |
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258 r._handler = self |
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259 r._host = host |
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260 r._url = req.get_full_url() |
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261 r._connection = h |
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262 r.code = r.status |
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263 r.headers = r.msg |
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264 r.msg = r.reason |
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265 |
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266 return r |
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267 |
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268 def _reuse_connection(self, h, req, host): |
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269 """start the transaction with a re-used connection |
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270 return a response object (r) upon success or None on failure. |
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271 This DOES not close or remove bad connections in cases where |
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272 it returns. However, if an unexpected exception occurs, it |
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273 will close and remove the connection before re-raising. |
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274 """ |
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275 try: |
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276 self._start_transaction(h, req) |
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277 r = h.getresponse() |
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278 # note: just because we got something back doesn't mean it |
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279 # worked. We'll check the version below, too. |
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280 except (socket.error, httplib.HTTPException): |
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281 r = None |
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282 except: # re-raises |
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283 # adding this block just in case we've missed |
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284 # something we will still raise the exception, but |
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285 # lets try and close the connection and remove it |
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286 # first. We previously got into a nasty loop |
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287 # where an exception was uncaught, and so the |
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288 # connection stayed open. On the next try, the |
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289 # same exception was raised, etc. The trade-off is |
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290 # that it's now possible this call will raise |
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291 # a DIFFERENT exception |
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292 if DEBUG: |
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293 DEBUG.error("unexpected exception - closing " |
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294 "connection to %s (%d)", host, id(h)) |
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295 self._cm.remove(h) |
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296 h.close() |
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297 raise |
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298 |
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299 if r is None or r.version == 9: |
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300 # httplib falls back to assuming HTTP 0.9 if it gets a |
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301 # bad header back. This is most likely to happen if |
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302 # the socket has been closed by the server since we |
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303 # last used the connection. |
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304 if DEBUG: |
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305 DEBUG.info("failed to re-use connection to %s (%d)", |
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306 host, id(h)) |
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307 r = None |
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308 else: |
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309 if DEBUG: |
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310 DEBUG.info("re-using connection to %s (%d)", host, id(h)) |
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311 |
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312 return r |
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313 |
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314 def _start_transaction(self, h, req): |
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315 # What follows mostly reimplements HTTPConnection.request() |
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316 # except it adds self.parent.addheaders in the mix and sends headers |
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317 # in a deterministic order (to make testing easier). |
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318 headers = util.sortdict(self.parent.addheaders) |
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319 headers.update(sorted(req.headers.items())) |
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320 headers.update(sorted(req.unredirected_hdrs.items())) |
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321 headers = util.sortdict((n.lower(), v) for n, v in headers.items()) |
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322 skipheaders = {} |
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323 for n in (r'host', r'accept-encoding'): |
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324 if n in headers: |
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325 skipheaders[r'skip_' + n.replace(r'-', r'_')] = 1 |
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326 try: |
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327 if urllibcompat.hasdata(req): |
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328 data = urllibcompat.getdata(req) |
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329 h.putrequest( |
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330 req.get_method(), urllibcompat.getselector(req), |
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331 **skipheaders) |
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332 if r'content-type' not in headers: |
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333 h.putheader(r'Content-type', |
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334 r'application/x-www-form-urlencoded') |
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335 if r'content-length' not in headers: |
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336 h.putheader(r'Content-length', r'%d' % len(data)) |
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337 else: |
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338 h.putrequest( |
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339 req.get_method(), urllibcompat.getselector(req), |
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340 **skipheaders) |
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341 except socket.error as err: |
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342 raise urlerr.urlerror(err) |
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343 for k, v in headers.items(): |
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344 h.putheader(k, v) |
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345 h.endheaders() |
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346 if urllibcompat.hasdata(req): |
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347 h.send(data) |
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348 |
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349 class HTTPHandler(KeepAliveHandler, urlreq.httphandler): |
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350 pass |
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351 |
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352 class HTTPResponse(httplib.HTTPResponse): |
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353 # we need to subclass HTTPResponse in order to |
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354 # 1) add readline(), readlines(), and readinto() methods |
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355 # 2) add close_connection() methods |
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356 # 3) add info() and geturl() methods |
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357 |
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358 # in order to add readline(), read must be modified to deal with a |
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359 # buffer. example: readline must read a buffer and then spit back |
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360 # one line at a time. The only real alternative is to read one |
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361 # BYTE at a time (ick). Once something has been read, it can't be |
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362 # put back (ok, maybe it can, but that's even uglier than this), |
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363 # so if you THEN do a normal read, you must first take stuff from |
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364 # the buffer. |
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365 |
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366 # the read method wraps the original to accommodate buffering, |
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367 # although read() never adds to the buffer. |
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368 # Both readline and readlines have been stolen with almost no |
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369 # modification from socket.py |
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370 |
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371 |
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372 def __init__(self, sock, debuglevel=0, strict=0, method=None): |
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373 extrakw = {} |
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374 if not pycompat.ispy3: |
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375 extrakw[r'strict'] = True |
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376 extrakw[r'buffering'] = True |
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377 httplib.HTTPResponse.__init__(self, sock, debuglevel=debuglevel, |
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378 method=method, **extrakw) |
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379 self.fileno = sock.fileno |
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380 self.code = None |
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381 self._rbuf = '' |
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382 self._rbufsize = 8096 |
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383 self._handler = None # inserted by the handler later |
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384 self._host = None # (same) |
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385 self._url = None # (same) |
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386 self._connection = None # (same) |
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387 |
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388 _raw_read = httplib.HTTPResponse.read |
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389 _raw_readinto = getattr(httplib.HTTPResponse, 'readinto', None) |
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390 |
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391 def close(self): |
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392 if self.fp: |
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393 self.fp.close() |
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394 self.fp = None |
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395 if self._handler: |
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396 self._handler._request_closed(self, self._host, |
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397 self._connection) |
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398 |
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399 def close_connection(self): |
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400 self._handler._remove_connection(self._host, self._connection, close=1) |
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401 self.close() |
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402 |
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403 def info(self): |
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404 return self.headers |
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405 |
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406 def geturl(self): |
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407 return self._url |
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408 |
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409 def read(self, amt=None): |
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410 # the _rbuf test is only in this first if for speed. It's not |
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411 # logically necessary |
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412 if self._rbuf and amt is not None: |
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413 L = len(self._rbuf) |
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414 if amt > L: |
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415 amt -= L |
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416 else: |
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417 s = self._rbuf[:amt] |
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418 self._rbuf = self._rbuf[amt:] |
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419 return s |
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420 # Careful! http.client.HTTPResponse.read() on Python 3 is |
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421 # implemented using readinto(), which can duplicate self._rbuf |
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422 # if it's not empty. |
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423 s = self._rbuf |
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424 self._rbuf = '' |
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425 s += self._raw_read(amt) |
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426 return s |
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427 |
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428 # stolen from Python SVN #68532 to fix issue1088 |
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429 def _read_chunked(self, amt): |
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430 chunk_left = self.chunk_left |
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431 parts = [] |
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432 |
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433 while True: |
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434 if chunk_left is None: |
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435 line = self.fp.readline() |
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436 i = line.find(';') |
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437 if i >= 0: |
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438 line = line[:i] # strip chunk-extensions |
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439 try: |
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440 chunk_left = int(line, 16) |
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441 except ValueError: |
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442 # close the connection as protocol synchronization is |
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443 # probably lost |
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444 self.close() |
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445 raise httplib.IncompleteRead(''.join(parts)) |
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446 if chunk_left == 0: |
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447 break |
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448 if amt is None: |
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449 parts.append(self._safe_read(chunk_left)) |
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450 elif amt < chunk_left: |
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451 parts.append(self._safe_read(amt)) |
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452 self.chunk_left = chunk_left - amt |
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453 return ''.join(parts) |
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454 elif amt == chunk_left: |
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455 parts.append(self._safe_read(amt)) |
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456 self._safe_read(2) # toss the CRLF at the end of the chunk |
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457 self.chunk_left = None |
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458 return ''.join(parts) |
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459 else: |
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460 parts.append(self._safe_read(chunk_left)) |
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461 amt -= chunk_left |
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462 |
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463 # we read the whole chunk, get another |
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464 self._safe_read(2) # toss the CRLF at the end of the chunk |
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465 chunk_left = None |
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466 |
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467 # read and discard trailer up to the CRLF terminator |
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468 ### note: we shouldn't have any trailers! |
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469 while True: |
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470 line = self.fp.readline() |
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471 if not line: |
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472 # a vanishingly small number of sites EOF without |
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473 # sending the trailer |
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474 break |
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475 if line == '\r\n': |
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476 break |
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|
477 |
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478 # we read everything; close the "file" |
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|
479 self.close() |
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|
480 |
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keepalive: don't concatenate strings when reading chunked transfer
Gregory Szorc <gregory.szorc@gmail.com>
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481 return ''.join(parts) |
7781
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482 |
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|
483 def readline(self): |
30688
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484 # Fast path for a line is already available in read buffer. |
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485 i = self._rbuf.find('\n') |
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486 if i >= 0: |
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487 i += 1 |
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488 line = self._rbuf[:i] |
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489 self._rbuf = self._rbuf[i:] |
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490 return line |
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491 |
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492 # No newline in local buffer. Read until we find one. |
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493 chunks = [self._rbuf] |
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494 i = -1 |
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|
495 readsize = self._rbufsize |
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496 while True: |
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497 new = self._raw_read(readsize) |
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498 if not new: |
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499 break |
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500 |
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501 chunks.append(new) |
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502 i = new.find('\n') |
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503 if i >= 0: |
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504 break |
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505 |
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506 # We either have exhausted the stream or have a newline in chunks[-1]. |
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507 |
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508 # EOF |
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509 if i == -1: |
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510 self._rbuf = '' |
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511 return ''.join(chunks) |
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512 |
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513 i += 1 |
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514 self._rbuf = chunks[-1][i:] |
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515 chunks[-1] = chunks[-1][:i] |
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516 return ''.join(chunks) |
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|
517 |
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Mads Kiilerich <madski@unity3d.com>
parents:
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518 def readlines(self, sizehint=0): |
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519 total = 0 |
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|
520 list = [] |
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1ffeeb91c55d
check-code: flag 0/1 used as constant Boolean expression
Martin Geisler <mg@lazybytes.net>
parents:
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521 while True: |
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522 line = self.readline() |
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523 if not line: |
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524 break |
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525 list.append(line) |
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|
526 total += len(line) |
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|
527 if sizehint and total >= sizehint: |
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|
528 break |
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|
529 return list |
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parents:
diff
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|
530 |
37297
97eedbd5a56c
keepalive: implement readinto()
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parents:
37119
diff
changeset
|
531 def readinto(self, dest): |
37587
192b7ad06932
keepalive: rewrite readinto() to not use read()
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|
532 if self._raw_readinto is None: |
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parents:
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533 res = self.read(len(dest)) |
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|
534 if not res: |
192b7ad06932
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|
535 return 0 |
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diff
changeset
|
536 dest[0:len(res)] = res |
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|
537 return len(res) |
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Augie Fackler <augie@google.com>
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|
538 total = len(dest) |
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diff
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|
539 have = len(self._rbuf) |
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parents:
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diff
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|
540 if have >= total: |
192b7ad06932
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parents:
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diff
changeset
|
541 dest[0:total] = self._rbuf[:total] |
192b7ad06932
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parents:
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diff
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|
542 self._rbuf = self._rbuf[total:] |
192b7ad06932
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parents:
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diff
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|
543 return total |
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parents:
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diff
changeset
|
544 mv = memoryview(dest) |
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parents:
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diff
changeset
|
545 got = self._raw_readinto(mv[have:total]) |
192b7ad06932
keepalive: rewrite readinto() to not use read()
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parents:
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diff
changeset
|
546 dest[0:have] = self._rbuf |
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parents:
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|
547 got += len(self._rbuf) |
192b7ad06932
keepalive: rewrite readinto() to not use read()
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parents:
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diff
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|
548 self._rbuf = '' |
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parents:
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diff
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|
549 return got |
37297
97eedbd5a56c
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parents:
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diff
changeset
|
550 |
9726
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changeset
|
551 def safesend(self, str): |
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parents:
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|
552 """Send `str' to the server. |
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diff
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|
553 |
430e59ff3437
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|
554 Shamelessly ripped off from httplib to patch a bad behavior. |
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|
555 """ |
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parents:
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|
556 # _broken_pipe_resp is an attribute we set in this function |
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parents:
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diff
changeset
|
557 # if the socket is closed while we're sending data but |
430e59ff3437
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parents:
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diff
changeset
|
558 # the server sent us a response before hanging up. |
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parents:
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diff
changeset
|
559 # In that case, we want to pretend to send the rest of the |
430e59ff3437
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Augie Fackler <durin42@gmail.com>
parents:
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diff
changeset
|
560 # outgoing data, and then let the user use getresponse() |
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parents:
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diff
changeset
|
561 # (which we wrap) to get this last response before |
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parents:
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diff
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|
562 # opening a new socket. |
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parents:
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diff
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|
563 if getattr(self, '_broken_pipe_resp', None) is not None: |
430e59ff3437
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Augie Fackler <durin42@gmail.com>
parents:
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|
564 return |
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parents:
8296
diff
changeset
|
565 |
430e59ff3437
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Augie Fackler <durin42@gmail.com>
parents:
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diff
changeset
|
566 if self.sock is None: |
430e59ff3437
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Augie Fackler <durin42@gmail.com>
parents:
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diff
changeset
|
567 if self.auto_open: |
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keepalive: handle broken pipes gracefully during large POSTs
Augie Fackler <durin42@gmail.com>
parents:
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diff
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|
568 self.connect() |
430e59ff3437
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Augie Fackler <durin42@gmail.com>
parents:
8296
diff
changeset
|
569 else: |
16687
e34106fa0dc3
cleanup: "raise SomeException()" -> "raise SomeException"
Brodie Rao <brodie@sf.io>
parents:
16686
diff
changeset
|
570 raise httplib.NotConnected |
9726
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parents:
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diff
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|
571 |
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parents:
8296
diff
changeset
|
572 # send the data to the server. if we get a broken pipe, then close |
430e59ff3437
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parents:
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|
573 # the socket. we want to reconnect when somebody tries to send again. |
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parents:
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diff
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|
574 # |
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parents:
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|
575 # NOTE: we DO propagate the error, though, because we cannot simply |
430e59ff3437
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parents:
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diff
changeset
|
576 # ignore the error... the caller will know if they can retry. |
430e59ff3437
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Augie Fackler <durin42@gmail.com>
parents:
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diff
changeset
|
577 if self.debuglevel > 0: |
27616
0765d8423fbc
keepalive: use print function
Gregory Szorc <gregory.szorc@gmail.com>
parents:
27507
diff
changeset
|
578 print("send:", repr(str)) |
9726
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parents:
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diff
changeset
|
579 try: |
10282
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Matt Mackall <mpm@selenic.com>
parents:
9726
diff
changeset
|
580 blocksize = 8192 |
14958
fd246aefedd3
keepalive: use safehasattr instead of hasattr
Augie Fackler <durin42@gmail.com>
parents:
14764
diff
changeset
|
581 read = getattr(str, 'read', None) |
fd246aefedd3
keepalive: use safehasattr instead of hasattr
Augie Fackler <durin42@gmail.com>
parents:
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diff
changeset
|
582 if read is not None: |
10282
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many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents:
9726
diff
changeset
|
583 if self.debuglevel > 0: |
27616
0765d8423fbc
keepalive: use print function
Gregory Szorc <gregory.szorc@gmail.com>
parents:
27507
diff
changeset
|
584 print("sending a read()able") |
14958
fd246aefedd3
keepalive: use safehasattr instead of hasattr
Augie Fackler <durin42@gmail.com>
parents:
14764
diff
changeset
|
585 data = read(blocksize) |
9726
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parents:
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diff
changeset
|
586 while data: |
430e59ff3437
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parents:
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diff
changeset
|
587 self.sock.sendall(data) |
14958
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parents:
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diff
changeset
|
588 data = read(blocksize) |
9726
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diff
changeset
|
589 else: |
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parents:
8296
diff
changeset
|
590 self.sock.sendall(str) |
25660
328739ea70c3
global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents:
22958
diff
changeset
|
591 except socket.error as v: |
9726
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parents:
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diff
changeset
|
592 reraise = True |
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593 if v[0] == errno.EPIPE: # Broken pipe |
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594 if self._HTTPConnection__state == httplib._CS_REQ_SENT: |
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595 self._broken_pipe_resp = None |
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596 self._broken_pipe_resp = self.getresponse() |
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597 reraise = False |
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598 self.close() |
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599 if reraise: |
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600 raise |
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601 |
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602 def wrapgetresponse(cls): |
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603 """Wraps getresponse in cls with a broken-pipe sane version. |
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604 """ |
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605 def safegetresponse(self): |
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606 # In safesend() we might set the _broken_pipe_resp |
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607 # attribute, in which case the socket has already |
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608 # been closed and we just need to give them the response |
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609 # back. Otherwise, we use the normal response path. |
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610 r = getattr(self, '_broken_pipe_resp', None) |
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611 if r is not None: |
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612 return r |
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613 return cls.getresponse(self) |
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614 safegetresponse.__doc__ = cls.getresponse.__doc__ |
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615 return safegetresponse |
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616 |
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617 class HTTPConnection(httplib.HTTPConnection): |
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618 # use the modified response class |
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619 response_class = HTTPResponse |
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620 send = safesend |
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621 getresponse = wrapgetresponse(httplib.HTTPConnection) |
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622 |
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623 |
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624 ######################################################################### |
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625 ##### TEST FUNCTIONS |
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626 ######################################################################### |
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627 |
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628 |
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629 def continuity(url): |
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630 md5 = hashlib.md5 |
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631 format = '%25s: %s' |
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632 |
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633 # first fetch the file with the normal http handler |
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634 opener = urlreq.buildopener() |
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635 urlreq.installopener(opener) |
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636 fo = urlreq.urlopen(url) |
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637 foo = fo.read() |
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638 fo.close() |
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639 m = md5(foo) |
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parents:
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640 print(format % ('normal urllib', node.hex(m.digest()))) |
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641 |
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642 # now install the keepalive handler and try again |
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643 opener = urlreq.buildopener(HTTPHandler()) |
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644 urlreq.installopener(opener) |
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645 |
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646 fo = urlreq.urlopen(url) |
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647 foo = fo.read() |
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648 fo.close() |
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649 m = md5(foo) |
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650 print(format % ('keepalive read', node.hex(m.digest()))) |
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651 |
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652 fo = urlreq.urlopen(url) |
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653 foo = '' |
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|
654 while True: |
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655 f = fo.readline() |
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656 if f: |
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657 foo = foo + f |
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|
658 else: |
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659 break |
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660 fo.close() |
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661 m = md5(foo) |
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662 print(format % ('keepalive readline', node.hex(m.digest()))) |
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663 |
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664 def comp(N, url): |
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665 print(' making %i connections to:\n %s' % (N, url)) |
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666 |
37119
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Yuya Nishihara <yuya@tcha.org>
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667 procutil.stdout.write(' first using the normal urllib handlers') |
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668 # first use normal opener |
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669 opener = urlreq.buildopener() |
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670 urlreq.installopener(opener) |
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671 t1 = fetch(N, url) |
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|
672 print(' TIME: %.3f s' % t1) |
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673 |
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674 procutil.stdout.write(' now using the keepalive handler ') |
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675 # now install the keepalive handler and try again |
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676 opener = urlreq.buildopener(HTTPHandler()) |
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677 urlreq.installopener(opener) |
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678 t2 = fetch(N, url) |
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679 print(' TIME: %.3f s' % t2) |
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|
680 print(' improvement factor: %.2f' % (t1 / t2)) |
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|
681 |
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682 def fetch(N, url, delay=0): |
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|
683 import time |
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|
684 lens = [] |
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|
685 starttime = time.time() |
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|
686 for i in range(N): |
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|
687 if delay and i > 0: |
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688 time.sleep(delay) |
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689 fo = urlreq.urlopen(url) |
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|
690 foo = fo.read() |
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|
691 fo.close() |
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|
692 lens.append(len(foo)) |
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|
693 diff = time.time() - starttime |
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|
694 |
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|
695 j = 0 |
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|
696 for i in lens[1:]: |
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|
697 j = j + 1 |
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|
698 if not i == lens[0]: |
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|
699 print("WARNING: inconsistent length on read %i: %i" % (j, i)) |
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|
700 |
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changeset
|
701 return diff |
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parents:
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changeset
|
702 |
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|
703 def test_timeout(url): |
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|
704 global DEBUG |
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|
705 dbbackup = DEBUG |
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Thomas Arendsen Hein <thomas@intevation.de>
parents:
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|
706 class FakeLogger(object): |
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707 def debug(self, msg, *args): |
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|
708 print(msg % args) |
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|
709 info = warning = error = debug |
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|
710 DEBUG = FakeLogger() |
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|
711 print(" fetching the file to establish a connection") |
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pycompat: switch to util.urlreq/util.urlerr for py3 compat
timeless <timeless@mozdev.org>
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712 fo = urlreq.urlopen(url) |
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Vadim Gelfer <vadim.gelfer@gmail.com>
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713 data1 = fo.read() |
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Vadim Gelfer <vadim.gelfer@gmail.com>
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714 fo.close() |
2600
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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|
715 |
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Vadim Gelfer <vadim.gelfer@gmail.com>
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716 i = 20 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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717 print(" waiting %i seconds for the server to close the connection" % i) |
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Vadim Gelfer <vadim.gelfer@gmail.com>
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718 while i > 0: |
37119
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Yuya Nishihara <yuya@tcha.org>
parents:
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719 procutil.stdout.write('\r %2i' % i) |
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parents:
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changeset
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720 procutil.stdout.flush() |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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721 time.sleep(1) |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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722 i -= 1 |
37119
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parents:
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|
723 procutil.stderr.write('\r') |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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changeset
|
724 |
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parents:
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changeset
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725 print(" fetching the file a second time") |
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timeless <timeless@mozdev.org>
parents:
28278
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changeset
|
726 fo = urlreq.urlopen(url) |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
727 data2 = fo.read() |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
728 fo.close() |
ff2bac730b99
http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
729 |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
730 if data1 == data2: |
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parents:
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|
731 print(' data are identical') |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
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|
732 else: |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
733 print(' ERROR: DATA DIFFER') |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
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|
734 |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
735 DEBUG = dbbackup |
ff2bac730b99
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
736 |
2600
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2444
diff
changeset
|
737 |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
738 def test(url, N=10): |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
739 print("performing continuity test (making sure stuff isn't corrupted)") |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
740 continuity(url) |
27616
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parents:
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diff
changeset
|
741 print('') |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
742 print("performing speed comparison") |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
743 comp(N, url) |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
744 print('') |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
745 print("performing dropped-connection check") |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
746 test_timeout(url) |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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|
747 |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
748 if __name__ == '__main__': |
ff2bac730b99
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
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|
749 import time |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
750 try: |
ff2bac730b99
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
751 N = int(sys.argv[1]) |
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
752 url = sys.argv[2] |
16688
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cleanup: replace naked excepts with more specific ones
Brodie Rao <brodie@sf.io>
parents:
16687
diff
changeset
|
753 except (IndexError, ValueError): |
27616
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
754 print("%s <integer> <url>" % sys.argv[0]) |
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http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
755 else: |
ff2bac730b99
http client: support persistent connections.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff
changeset
|
756 test(url, N) |